Exchange leaders will be dealing with big changes at their respective companies in 2016, from launching new competing markets and dealing with new regulation to integrating new data acquisitions to expanding across different time zones. The John Lothian News Sweet 16 Series featured our best ideas and thoughts about exchanges, regulation, economics and technology. But there are still more great ideas for 2016 that made our honorable mention. Here are comments from Art Hahn of Katten, Travis Schwab of Eventus Systems, Steve Probst of Global Risk, Brendan Bradley of Eurex, Justin Llewellyn-Jones of Fidessa on regulation.